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[dinosaur] Amphibians in Permian Sundyr Tetrapod Assemblage + Temujiniid lizards from Cretaceous of Mongolia





Ben Creisler
bcreisler@gmail.com


New non-dino papers:


V. K. Golubev & V. V. Bulanov (2018)
Amphibians of the Permian Sundyr Tetrapod Assemblage of Eastern Europe.
Paleontological Journal 52(6): 639â652Â
doi: https://doi.org/10.1134/S0031030118060059
https://link.springer.com/article/10.1134/S0031030118060059


Amphibian remains from Sundyr-1 (Russia, Mari El Republic), the reference locality of the Sundyr Tetrapod Assemblage, are identified and described. The assemblage is assigned to the lower Upper Severodvinian Substage (Lower Putyatinian Subhorizon). It is shown that the taxonomic list of the Sundyr-1 locality includes five species, which belong to five genera and four families (Kotlassiidae, Dvinosauridae, Chroniosuchidae, and Enosuchidae). The aquatic tetrapod association of the Sundyr Assemblage occupies an intermediate position between Isheevo and Sokolki tetrapod communities and is mostly composed of genera and species from both of them. Archegosauroid temnospondyls are completely absent; the trophic niche of predominate piscivorous hunter of the community is occupied by the chroniosuchian Suchonica vladimiri. Except for the last taxon, amphibians of the Sundyr-1 locality are represented by pedomorphic, constantly aquatic taxa varying in trophic specialization.


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V. R. Alifanov (2018)
Lizards of the Family Temujiniidae (Iguanomorpha): Finds from the AptianâAlbian of Mongolia, Classification and Geographical Origin.
Paleontological Journal 52(6): 653â663
doi: https://doi.org/10.1134/S0031030118060023
https://link.springer.com/article/10.1134/S0031030118060023



The frontals belonging to the lizard family Temujiniidae from the AptianâAlbian of the Khobur vertebrate locality (Mongolia) are described. This taxon is an extinct and morphologically deviating lineage of the microorder Iguanomorpha (Iguanidae sensu lato). Its extant forms are represented by a series of families, which are classified in the present study as the superfamilies Phrynosomatoidea, Corytophanoidea, and Iguanoidea. The specimens from the Khobur locality suggest that the origin of Temujiniidae is connected with Central Asia and the initial distribution of Iguanomorpha as a whole, with northern continents.





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